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96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/* <DESC>
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* one way to set the necessary OpenSSL locking callbacks if you want to do
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* multi-threaded transfers with HTTPS/FTPS with libcurl built to use OpenSSL.
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* </DESC>
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*/
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/*
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* This is not a complete stand-alone example.
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*
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* Author: Jeremy Brown
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*/
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#include <stdio.h>
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#include <pthread.h>
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#include <openssl/err.h>
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#define MUTEX_TYPE pthread_mutex_t
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#define MUTEX_SETUP(x) pthread_mutex_init(&(x), NULL)
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#define MUTEX_CLEANUP(x) pthread_mutex_destroy(&(x))
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#define MUTEX_LOCK(x) pthread_mutex_lock(&(x))
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#define MUTEX_UNLOCK(x) pthread_mutex_unlock(&(x))
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#define THREAD_ID pthread_self()
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void handle_error(const char *file, int lineno, const char *msg)
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{
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fprintf(stderr, "** %s:%d %s\n", file, lineno, msg);
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ERR_print_errors_fp(stderr);
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/* exit(-1); */
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}
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/* This array will store all of the mutexes available to OpenSSL. */
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static MUTEX_TYPE *mutex_buf = NULL;
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static void locking_function(int mode, int n, const char *file, int line)
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{
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if(mode & CRYPTO_LOCK)
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MUTEX_LOCK(mutex_buf[n]);
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else
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MUTEX_UNLOCK(mutex_buf[n]);
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}
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static unsigned long id_function(void)
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{
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return ((unsigned long)THREAD_ID);
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}
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int thread_setup(void)
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{
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int i;
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mutex_buf = malloc(CRYPTO_num_locks() * sizeof(MUTEX_TYPE));
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if(!mutex_buf)
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return 0;
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for(i = 0; i < CRYPTO_num_locks(); i++)
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MUTEX_SETUP(mutex_buf[i]);
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CRYPTO_set_id_callback(id_function);
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CRYPTO_set_locking_callback(locking_function);
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return 1;
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}
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int thread_cleanup(void)
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{
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int i;
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if(!mutex_buf)
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return 0;
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CRYPTO_set_id_callback(NULL);
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CRYPTO_set_locking_callback(NULL);
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for(i = 0; i < CRYPTO_num_locks(); i++)
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MUTEX_CLEANUP(mutex_buf[i]);
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free(mutex_buf);
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mutex_buf = NULL;
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return 1;
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}
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